Free bitcoin offer – never received

Hello,
I originally subscribed to 99bitcoins because the site was promoting receiving 99 bitcoins for signing up. I have not received instructions on how to receive them. Most people signing up are new to Bitcoin and do not actually have wallets yet, so they are not able to claim their reward right away. Now that I am setup with a wallet, how am I supposed to claim the free bitcoins as advertised on the public site and from the email? Do I need to submit my public wallet ID?
Thank you